A three-phase electricity meter detection tray

Abstract

This invention provides a three-phase electricity meter testing tray, belonging to the field of electricity meter testing technology. It includes a tray body with a loading area and two cavities for loading electricity meters. A partition component is provided between the two cavities, and the partition component is movably mounted on the tray body. The three-phase electricity meter testing tray provided by this invention allows the electricity meter to be moved between adjacent cavities by removing the partition component.

Description

Technical Field

[0001] This invention belongs to the field of electricity meter testing technology, and more specifically, relates to a three-phase electricity meter testing tray. Background Technology

[0002] With the increasing scale and management intensity of smart grid construction year by year, power grid companies have put forward new requirements for the testing and information collection functions of smart meters. In order to meet market demand and make the testing and information collection of single and three-phase meters more convenient, some meter manufacturers have launched meters with Bluetooth communication functions. This allows the meter testing and information collection process to be completed without having to connect the testing equipment to the low-voltage terminals of the meter.

[0003] All smart meters undergo a series of tests before leaving the factory. For single-phase and three-phase smart meters with Bluetooth functionality, Bluetooth function testing is a crucial part of this process. Current methods for testing Bluetooth functionality involve placing Bluetooth testing units at intervals on the meter testing line, with each unit installed directly above each testing station. The meters are transported in testing trays and undergo Bluetooth function testing after moving to their respective testing stations on the testing line.

[0004] In daily production, the testing devices used to test electricity meters at each station on the production line require regular spot checks, maintenance, and calibration. The conventional calibration method involves placing a calibration meter in a testing tray and moving it along the production line to calibrate the testing devices at each station. However, existing testing trays have multiple cavities for loading electricity meters, and partitions between these cavities restrict the movement of the meters. In actual production, one testing tray can hold multiple electricity meters at a time, corresponding to multiple testing stations simultaneously. However, when calibrating the testing devices at each station, the calibration... There is usually only one energy meter used. During the calibration of the testing devices on the production line, the calibration energy meter mounted on the testing tray cannot change its chamber due to the restriction of the partition components of adjacent chambers and the Bluetooth detection unit above the workstation. Therefore, every time the testing tray moves, the calibration energy meter can only calibrate one of the multiple testing devices corresponding to the testing tray. As a result, to complete the calibration of all testing devices on the production line, the calibration energy meter needs to be cycled multiple times on the production line, which not only wastes energy but also increases the labor intensity of the staff. Summary of the Invention

[0005] The purpose of this invention is to provide a three-phase electricity meter testing tray to solve the technical problem in the prior art that the cavity of the three-phase electricity meter cannot be changed on the testing tray when the calibration and testing equipment is used.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a three-phase electricity meter testing tray is provided, including a tray body, a loading area on the tray body, two cavities for loading electricity meters on the loading area, a partition member between the two cavities, and the partition member being movably disposed on the tray body.

[0007] In one possible implementation, the partition component has a locking block on the side facing the cavity, the locking block pressing against the outer wall of the energy meter to lock the energy meter inside the cavity.

[0008] In one possible implementation, the partition component includes a first rod and a second rod hinged at one end, the locking block is located on the first rod, the second rod is embedded in the upper end face of the tray body, and the first rod rotates outward to avoid the electricity meter.

[0009] In one possible implementation, a torsion spring is provided at the hinge joint between the first rod and the second rod. The first rod has a first groove extending through its upper and lower end faces at one end located in the loading area. A sliding switch is installed in the first groove. A hook is provided at the lower end of the sliding switch. A hook portion is provided on the second rod corresponding to the hook.

[0010] In one possible implementation, the first rod has a protrusion and the second rod has a recess, the protrusion and the recess cooperating with each other to restrict the first rod from moving to any adjacent cavity.

[0011] In one possible implementation, the first rod body has a blind hole on the side facing the cavity, the locking block is slidably disposed in the blind hole, and the locking block is connected to the bottom of the blind hole through a second elastic member.

[0012] In one possible implementation, a second groove is formed along the length of the first rod body, and a top rod is slidably disposed within the second groove. The first rod body also has a first chamber located on the side of the second groove closer to the cavity. A sliding component is disposed within the first chamber, with one end of the sliding component away from the second groove penetrating the first rod body and the other end having an inclined groove. The top rod is slidably disposed within the inclined groove. A blind hole is provided where the sliding component penetrates the first chamber. A support rod is provided on the partition component, with one end hinged to the top rod and the other end hinged to the end of the second rod body away from the loading area. When the first rod body rotates relative to the second rod body, the support rod drives the top rod to slide within the second groove, thereby moving the sliding component closer to or away from the cavity.

[0013] In one possible implementation, a third elastic member is provided between the sliding member and the first chamber.

[0014] In one possible implementation, the first slide groove and the second slide groove are interconnected, a slide rod is provided in the first slide groove, the top rod is connected to the slide rod, a first elastic member is connected to one end of the slide rod near the second slide groove, and the other end of the first elastic member abuts against the slide switch.

[0015] In one possible implementation, a ball bearing is embedded at the end of the card block facing the cavity.

[0016] The beneficial effects of the three-phase electricity meter testing tray provided by the present invention are as follows: Compared with the prior art, the three-phase electricity meter testing tray of the present invention, by movably setting the partition component between the two cavities for loading electricity meters on the tray body, when the electricity meter needs to change position between the two cavities in the loading area, firstly, the partition component is removed from the tray body, then the electricity meter is moved to the adjacent cavity, and finally the partition component is reinstalled on the tray body. This operation completes the position change of the electricity meter between the two cavities in the loading area. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a top view of the three-phase meter testing tray provided in an embodiment of the present invention;

[0019] Figure 2 for Figure 1 Sectional view along line AA;

[0020] Figure 3 for Figure 2 A structural diagram of another state;

[0021] Figure 4 for Figure 2 Sectional view along line BB;

[0022] Figure 5 for Figure 2 A cross-sectional view along the CC line;

[0023] Figure 6 for Figure 4 A sectional view along the DD line;

[0024] Figure 7 for Figure 4 A cross-sectional view along the EE line.

[0025] The following are the labeling elements in the figure:

[0026] 1. Pallet body; 101. Longitudinal positioning block; 102. Lateral positioning block; 103. Loading area; 104. Cavity; 2. Partition component; 21. First rod; 201. First slide groove; 202. Second slide groove; 203. First chamber; 204. First clearance groove; 205. Second clearance groove; 22. Second rod; 221. Long groove; 3. Sliding switch; 301. Push block; 302. L-shaped vertical rod; 303. Protrusion; 304. Extension section; 41. Raised rib; 42. Groove; 5. Locking block; 51. Blind hole; 501. First elastic component; 502. Second elastic component; 503. Third elastic component; 6. Slide rod; 61. Top rod; 7. Support rod; 8. Sliding component; 81. Inclined groove; 82. Extension end; 811. Inclined section; 812. Straight section; 9. Ball bearing. Detailed Implementation

[0027] To make the technical problems, solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0029] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] Please see Figures 1 to 2 The present invention will now describe a three-phase electricity meter testing tray. A three-phase electricity meter testing tray includes a tray body 1, a loading area 103 on the tray body 1, and two cavities 104 for loading electricity meters on the loading area 103. A partition member 2 is provided between the two cavities 104, and the partition member 2 is movably disposed on the tray body 1. The movable disposal method includes plug-in connection, magnetic connection, or threaded connection, etc.

[0032] The tray body 1 is also provided with a longitudinal positioning block 101 and a transverse positioning block 102. The longitudinal positioning block 101 divides the upper surface of the tray body 1 into a loading area 103 and a non-loading area. The longitudinal positioning block 101 is used to prevent the electricity meter from moving longitudinally from the loading area 103 to the non-loading area and leaving the loading area 103. The transverse positioning block 102 is located on the left and right sides of the tray body 1 and is used to prevent the electricity meter loaded in the loading area 103 from moving laterally and falling out of the tray body 1. It is easy to understand that in this embodiment, the transverse positioning block 102, the longitudinal positioning block 101 and the partition component 2 located on both sides of the tray body 1 divide the loading area 103 into two hopper-shaped cavities 104, which are used to load the electricity meter.

[0033] Compared with the prior art, the three-phase electricity meter testing tray provided by the present invention movably connects the partition component 2, which is set between the two cavities 104 for loading electricity meters, to the tray body 1. When the electricity meter needs to change position between the two cavities 104 in the loading area 103, the partition component 2 is first removed from the tray body 1, then the electricity meter is moved to the adjacent cavity 104, and finally the partition component 2 is reinstalled on the tray body 1. This operation completes the position change of the electricity meter between the two cavities in the loading area 103.

[0034] Please see Figures 1 to 5As a specific embodiment of the three-phase electricity meter testing tray provided by the present invention, the number of partition components 2 is one. The partition component 2 is a rod with one end located in the loading area 103 and the other end located in the non-loading area, including a first rod 21 and a second rod 22. The first rod 21 is located above the second rod 22. The ends of the first rod 21 and the second rod 22 in the non-loading area 103 are hinged together. It is easy to understand that the first rod 21 can rotate relative to the second rod 22 around the hinged end. By rotating, the ends of the first rod 21 and the second rod 22 in the loading area 103 can be brought into contact with each other or moved away. The second rod 22 is completely embedded in the tray body 1. The upper surface of the second rod 22 is flush with the upper surface of the tray body 1. In actual operation, when the electricity meter needs to move to an adjacent chamber, it is only necessary to rotate the first rod 21 so that the part of the rod in the loading area 103 leaves the loading area 103, so that there is no obstruction between the adjacent cavities 104 and the electricity meter can be moved horizontally.

[0035] Please see Figures 2 to 3 As a specific embodiment of the three-phase meter testing tray provided by the present invention, a torsion spring is provided at the hinge of the first rod 21 and the second rod 22. The first rod 21 is provided with a first sliding groove 201 that penetrates its upper and lower end faces at one end of the loading area 103. A sliding switch 3 is provided in the first sliding groove 201. A hook is provided at the lower end of the sliding switch 3. A hook part is provided on the second rod 22 corresponding to the hook. The sliding switch 3 is operated to connect or disconnect the hook part, so as to make the first rod 21 and the second rod 22 close to or away from each other at one end of the loading area 103.

[0036] In this embodiment, the first groove 201 is a through groove that passes through the upper and lower end faces of the first rod 21 and is located at one end of the first rod 21 in the loading area 103. The sliding switch 3 includes a push block 301 and an L-shaped vertical rod 302. The push block 301 is located on the upper end face of the first rod 21, and the L-shaped vertical rod 302 is disposed in the first groove 201. A hook part is provided on one end of the second rod 22 in the loading area 103 to engage with the L-shaped vertical rod 302. In this embodiment, a long groove 221 is provided along the length direction on the end face of the second rod 22 facing the first rod 21. A protrusion 303 is provided at the end of the long groove 221 corresponding to the sliding switch 3. The protrusion 303 is located on the upper part of the long groove 221 and extends a distance along the length direction into the interior of the long groove 221. The protrusion 303 is the hook part.

[0037] Optionally, the upper surface of the push block 301 is provided with anti-slip texture, which helps to increase the friction of the upper surface of the push block 301 and makes it easier for a person to push the slide switch 3.

[0038] In this embodiment, when the sliding switch 3 is closed, i.e., when the hook is connected to the hook part, the ends of the first rod 21 and the second rod 22 in the loading area 103 are attached together. At this time, the torsion spring is in a compressed state, and the first rod 21 is blocked between two adjacent cavities 104, hindering the horizontal movement of the energy meter. When the sliding switch 3 is opened, i.e., when the hook is disengaged from the hook part, the first rod 21 rotates under the action of the torsion spring force, causing the ends of the first rod 21 and the second rod 22 in the loading area 103 to move away from each other. This allows the first rod 21 to move away from the loading area 103, making the two adjacent cavities 104 unobstructed, and allowing the energy meter to be moved horizontally into the adjacent cavity 104.

[0039] Further, please refer to Figure 3 and Figure 5 The first rod 21 has a protrusion and the second rod 22 has a concave part. The protrusion and the concave part cooperate with each other to restrict the first rod 21 from moving to any adjacent cavity 104.

[0040] In this embodiment, the protrusion on the first rod 21 is a ridge 41 provided on the end face of the first rod facing the second rod 22. The ridge 41 is provided along the length direction of the first rod 21, and the number can be one or more. The recess on the second rod 22 is a groove 42 provided on the end face of the second rod 22 facing the first rod 21. The groove 42 is provided along the length direction of the second rod 22, and the number and length of the grooves match the ridge 41. When the first rod 21 is attached to the upper surface of the second rod 22, the ridge 41 is inserted into the groove 42. Through the cooperation between the ridge 41 and the groove 42, the movement of the first rod 21 to any adjacent cavity 104 can be restricted.

[0041] Please see Figure 1 , Figure 4 , Figure 6 As a specific embodiment of the three-phase meter testing tray provided by the present invention, the partition component 2 is provided with a locking block 5 on the side facing the cavity 104. The locking block 5 is used to lock the electricity meter in the cavity 104.

[0042] Furthermore, the first rod 21 has a blind hole 51 on the side facing the cavity 104, and the locking block 5 is slidably disposed in the blind hole 51. The locking block 5 is connected to the bottom of the blind hole 51 through the second elastic member 502.

[0043] In this embodiment, the opening direction of the blind hole 51 faces the cavity 104. By connecting the locking block 5 and the bottom of the blind hole 51 with the second elastic member 502, the locking block 5 is tightly pressed against the outer shell of the electricity meter under the elastic force of the second elastic member 502, preventing the electricity meter from moving during the detection process.

[0044] Optionally, the second elastic component 502 is a coil spring.

[0045] Please see Figures 2 to 4 As a specific embodiment of the three-phase meter testing tray provided by the present invention, a second sliding groove 202 is provided inside the first rod 21 along the length direction, and the second sliding groove 202 is in communication with the first sliding groove 201. A sliding rod 6 is provided in the second sliding groove 202, and a first elastic member 501 is provided at one end of the sliding rod 6 near the first sliding groove 201. When the first rod 21 and the second rod 22 are in contact, the first elastic member 501 is squeezed by the sliding rod 6 and abuts against the sliding switch 3. Specifically, the sliding switch 3 also includes an extension section 304. Section 304 is connected to the middle of the L-shaped vertical rod 302 in the sliding switch 3 and is slidably disposed in the second slide groove 202. The first elastic member 501 abuts against the extension section 304. A support rod 7 is hinged to one end of the long groove 221 provided on the second rod body 22 at the non-loading area 103. The other end of the support rod 7 is hinged to the slide rod 6. A second clearance groove 205 is also provided through the side wall of the second slide groove 202 near the second rod body 22. The second clearance groove 205 is used to provide sliding space for the hinged ends of the support rod 7 and the slide rod 6 on the first rod body 21. It is easy to understand that when the first rod body 21 rotates, the support rod 7 rotates under the drive of the first rod body 21, thereby controlling the slide rod 6 to slide in the second slide groove 202.

[0046] In this embodiment, when the slide switch 3 is closed, the support rod 7 controls the slide rod 6 to compress the first elastic component 501. The first elastic component 501 abuts against the extension section 304 of the slide switch 3. The extension section 304 is subjected to the elastic force of the first elastic component 501, causing the slide switch 3 to press against the side of the first slide groove 201 away from the second slide groove 202. Therefore, the hook on the slide switch 3 is stably connected to the hook part. When it is necessary to move the energy meter, the slide switch 3 is pushed, compressing the first elastic component 501, causing the hook to disengage from the hook part. Under the action of the torsion spring, the first rod body 21 rotates, simultaneously driving the support rod 7 to rotate. Under the action of the support rod 7, the slide rod 6 slides away from the end away from the first slide groove 201, while simultaneously moving the first elastic component 501 away from the extension section 304.

[0047] Please see Figures 2 to 7As a specific embodiment of the three-phase meter testing tray provided by the present invention, the first rod body 21 is further provided with a first chamber 203, which is located on the side of the second slide groove 202 near the cavity 104. The first chamber 203 is provided with a sliding component 8. One end of the sliding component 8 away from the second slide groove 202 penetrates the side wall of the first rod body 21 near the cavity 104, and the other end of the sliding component 8 is provided with an inclined groove 81. A blind hole 51 is provided on the end face of the sliding component 8 away from the second slide groove 202, and a locking block 5 is provided in the blind hole 51. A top rod 61 is provided in the second slide groove 202. The top rod 61 is connected to the slide rod 6, and the top rod 61 and the slide rod 6 are perpendicular to each other. The second slide 202 is provided with a first clearance groove 204 on the side wall near the cavity 104. The first clearance groove 204 provides sliding space for the push rod 61 to slide in the second slide 202. The end of the push rod 61 away from the slide rod 6 is slidably disposed in the inclined groove 81. When the first rod body 21 rotates, the support rod 7 drives the slide rod 6 and the push rod 61 to slide in the second slide 202. At the same time, the end of the push rod 61 slides in the inclined groove 81 of the sliding component 8. Under the action of the inclined groove 81, the push rod 61 causes the sliding component 8 to slide closer to or away from the cavity 104 in the first chamber 203, so that the locking block 5 provided on the sliding component 8 abuts against or moves away from the energy meter.

[0048] In this embodiment, the sliding component 8 is C-shaped, with its concave side facing the cavity 104. The C-shaped sliding component 8 includes two extension ends 82, which penetrate the sidewall of the first chamber 203 near the cavity 104. Each extension end 82 has a blind hole 51, and a locking block 5 is provided inside the blind hole 51. The convex side of the C-shaped sliding component 8 faces the second slide groove 202, and an inclined groove 81 is provided thereon. The inclined groove 81 is arranged along the length direction of the C-shaped sliding component 8 and includes an inclined segment 811 and a straight segment 812. The inclined segment 811 is located in the middle of the convex end face of the C-shaped sliding component 8 and extends away from the first slide groove 2 along the C-shaped sliding component 8. The C-shaped sliding component 8 is inclined towards one concave end in the direction of 01. The straight segment 812 connects to the inclined segment 811 and passes through the end of the sliding component 8 away from the first slide groove 201. In actual use, when the first rod 21 rotates, the support rod 7 drives the sliding rod 6 to slide in the second slide groove 202. The sliding rod 6 drives the top rod 61 to slide in the inclined groove 81 of the C-shaped sliding component 8. When the top rod 61 slides to the inclined segment 811, the C-shaped sliding component 8, under the action of the top rod 61 and the inclined segment 811, moves closer to or away from the cavity 104 side in the first chamber 203, thereby causing the locking blocks 5 on the two extended ends of the C-shaped sliding component 8 to lock or release the energy meter. It is easy to understand that there are two C-shaped sliding components 8 and two first chambers 203, which are symmetrically arranged on both sides of the second slide groove 202.

[0049] Please see Figure 4 As a specific embodiment of the three-phase meter testing tray provided by the present invention, a third elastic component 503 is provided between the sliding component 8 and the side wall of the first chamber 203 near the cavity 104.

[0050] In this embodiment, the third elastic component 503 is disposed on the concave side of the C-shaped sliding component 8 and connected between the C-shaped sliding component 8 and the side wall of the first chamber 203. By providing the third elastic component 503, when the push rod 61 is in the inclined section 811, the third elastic component 503 is in a compressed state. When the push rod 61 is disengaged from the inclined section 811, the C-shaped sliding component 8 moves closer to the second slide groove 202 under the elastic force of the second elastic component 502, thereby making the locking block 5 provided on the extended end of the C-shaped sliding component 8 move away from the electricity meter, making it easy to remove the electricity meter.

[0051] Please see Figure 4 , Figure 6 and Figure 7 As a specific embodiment of the three-phase meter testing tray provided by the present invention, the end of the card block 5 facing the cavity 104 is inlaid with a ball bearing 9.

[0052] In this embodiment, when the first rod 21 rotates, the movement trajectory of the locking block 5 is an arc. In order to reduce the friction between the locking block 5 and the electricity meter housing, a ball bearing 9 is embedded on the end face of the locking block 5 facing the cavity 104, so that the sliding friction between the locking block 5 and the electricity meter housing is converted into rolling friction, thereby reducing the friction between the locking block 5 and the electricity meter housing and reducing the scratching problem of the electricity meter housing caused by friction.

[0053] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A three-phase meter detection tray, characterized by, The pallet includes a pallet body (1), which has a loading area (103) and two cavities (104) for loading electricity meters. A partition member (2) is provided between the two cavities (104) and the partition member (2) is movably disposed on the pallet body (1). The partition component (2) includes a first rod (21) and a second rod (22) hinged at one end by a torsion spring. The second rod (22) is embedded in the upper end face of the tray body (1). The first rod (21) is located above the second rod (22). The first rod (21) rotates outward to avoid the electricity meter, so that there is no obstruction between adjacent cavities (104). The electricity meter can be translated and changed position. The first rod (21) is provided with a protrusion (41), and the second rod (22) is provided with a groove (42). The protrusion (41) and the groove (42) cooperate with each other to restrict the electricity meter from moving to any cavity (104) after the first rod (21) is reset. The first rod (21) has a second groove (202) along its length inside, and a slide rod (6) is provided in the second groove (202). The first rod (21) also has a first chamber (203) inside, which is located on the side of the second groove (202) near the cavity (104). The first chamber (203) has a sliding component (8) inside, with one end of the sliding component (8) away from the second groove (202) penetrating the side wall of the first rod (21) near the cavity (104). The other end of the sliding component (8) has an inclined groove (8). 1) A third elastic component (503) is provided between the sliding component (8) and the first chamber (203). A blind hole (51) is provided on the end face of the sliding component (8) away from the second slide groove (202). A locking block (5) is provided in the blind hole (51). The locking block (5) is used to lock the energy meter in the cavity (104) by pressing the outer wall of the energy meter. A top rod (61) is provided on the slide rod (6). The top rod (61) is perpendicular to the slide rod (6). The end of the top rod (61) away from the slide rod (6) is slidably disposed in the inclined groove (81). The second rod (22) is provided with a support rod (7). One end of the support rod (7) is hinged to the slide rod (6), and the other end is hinged to the end of the second rod (22) away from the loading area (103). When the first rod (21) is rotated, the support rod (7) drives the slide rod (6) to slide in the second slide groove (202) so as to drive the end of the top rod (61) to slide in the inclined groove (81) so that the sliding component (8) slides in the first chamber (203) and moves closer to or away from the cavity (104) so ​​that the locking block (5) provided on the sliding component (8) abuts against or moves away from the energy meter.

2. The three-phase meter detection tray of claim 1, wherein, The first rod (21) is provided with a first groove (201) that runs through its upper and lower end faces at one end of the loading area (103). A sliding switch (3) is provided in the first groove (201). A hook is provided at the lower end of the sliding switch (3). A hook part is provided on the second rod (22) corresponding to the hook.

3. The three-phase meter testing tray as described in claim 1, characterized in that, The card block (5) is slidably disposed in the blind hole (51), and the card block (5) is connected to the bottom of the blind hole (51) through a second elastic member (502).

4. The three-phase meter testing tray as described in claim 2, characterized in that, The first slide groove (201) is connected to the second slide groove (202). The slide rod (6) is connected to a first elastic component (501) at one end near the second slide groove (202), and the other end of the first elastic component (501) abuts against the slide switch (3).

5. The three-phase meter testing tray as described in any one of claims 2-4, characterized in that, The end of the card block (5) facing the cavity (104) is inlaid with a ball (9).

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